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Analog circuits miscellaneous

  1. The saturation voltage of the ideal op-amp shown below is ±10V. The output volt age v0, of the following circuit in the steady-state is

    1. Square wave of period 0.55 ms
    2. Triangular wave of period 0.55 ms
    3. Square wave of period 0.25 ms
    4. Triangular wave of period 0.25 ms
Correct Option: A

Astable multivibrator produces square wave.

Now , β =
R2
R1 + R2

=
2
= 0.5
4

Now , T = 2Rc
(1 + β)
(1 - β)

= 2 × 1 × 103 × 0.25 × 10-6 log
(1 + 0.5)
= 0.55 ms
(1 - 0.5)

Thus the output voltage (V0) is square wave with time.



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